VGA optical transceiver adopts pure digital transmission mode, which can fundamentally overcome the tailing, ghosting and other phenomena caused by ordinary copper core cable transmission system when transmitting high-frequency signals, and reproduce the image clearly. VGA optical transceiver transmits optical signals without electromagnetic radiation, and the system has extremely high confidentiality. At the same time, the VGA optical transceiver completely isolates the display device and the signal source electrically, and has a very high anti-interference ability.
VGA digital optical transceiver is aimed at specific monitoring and display occasions (such as conference centers, presentation halls, checkpoints, cashier stations, military exercise monitoring stations, etc.) that use computers as the mainstay to transmit the output content of the user's computer graphics card through the digital channel for long distances and real-time transmission To the remote terminal equipment (computer monitor, TV wall, projector, etc.) display output requirements, so as to realize the high-resolution, no delay, long-distance optical fiber communication conversion application of the computer VGA interface signal, which can reach a machine (computer) Operation, multi-terminal (display terminal) display effect; VGA optical transceiver can also be extended to support ultra-remote (several kilometers away) mouse and keyboard real-time monitoring and control functions, both ultra-remote "one machine, multi-control" and "one machine multi-control" solution.
VGA digital optical transceiver transmits high-definition computer video up to 80 kilometers through standard single-core single-mode fiber, which greatly saves fiber resources. The through loop of the transmitter is used for the monitoring of the local computer. The receiver has an output port. The LED indicators of the transmitter and receiver can show the status of power, video and light signals. The DVI optical transceiver system provides long-distance transmission for high-resolution computer video signals. It is a highly flexible professional system. The system is specially used in professional A/V, security system, campus environment, industrial monitoring and large-scale conference venues (stadiums), etc., to meet the needs of remote access to computers or computer video signals. This device supports one DVI input, one optical output and one VGA local monitoring output. Used in conjunction with the (multimode)/(single mode) optical transceiver receiver, the supported resolutions are 800x600 (all refresh rates), 1024x768 (above 70HZ), other resolutions and refresh rates are related to the screen, and most displays are supported , But there will be a few screens that cannot be displayed. Support VGA, PS2 port, audio, MIC interface.
1. With the rapid development of medical equipment technology and the continuous improvement of the knowledge level of medical personnel, many cutting-edge scientific research projects have been expanded in the field of medical imaging. In order to explore the mystery of the advanced functions of the human brain and conduct scientific analysis of human psychology, functional magnetic resonance Imaging research technology is developing vigorously, and many life science MRI brain function research centers have been established internationally. Based on a large number of research results, brain function technology has gradually moved into the preparation stage for clinical application.
Functional magnetic resonance imaging (functional magnetic resonance imaging, fMRI) is a new imaging technology that has developed rapidly, which uses blood oxygenation level-dependent (BOLD) measurement to analyze the advanced functions of the human brain. We use visual, auditory, motor, tactile or cognitive stimuli to activate different areas of the brain, and at the same time use high-resolution, non-invasive functional magnetic resonance imaging technology to detect these activation areas.
2. The audio and video structure and schematic diagram of the brain function visual and auditory stimulation system.
Due to the particularity of medical equipment and the nuclear magnetic resonance environment, very stringent requirements are put forward for the processing and transmission of various video images and audio: transmission of high-quality audio and video signals; The stability of the product use; the product can run in a high magnetic field environment, the product and the field equipment are highly integrated. Feichang Technology has established a dedicated team to carry out a large number of research and inspections for medical use. Feichang Technology's professional solutions and products have been recognized by many customers in the industry.
1). Visual system: Transmit text or pictures to the magnetic resonance scanner, so that the subject can receive visual stimuli or get instructions for functional testing from the screen. The use of NMR spectacles to help patients with visual impairment complete the stimulation task.
2). Two-way non-magnetic audio system: the sound is transmitted to the magnetic resonance scanner, so that the subject can receive auditory stimuli or receive instructions for functional visual inspection from the sound.
3). Subject's response feedback system: the feedback of the subject monitors the correct rate and response time of the subject's response by button feedback.
3. Design of audio and video solutions for brain function visual and auditory stimulation system .
Program description:
1). Video transmission: test images of computer and DVD are connected to the audio and video switching controller, and output a VGA signal through a pair of VGA high-definition optical transceivers to transmit to digital Optical processing system.
2). Audio and return signal transmission: the test music and the audio of the microphone are transmitted to the MRI room through a pair of special multi-function optical transceivers, so that the subject can receive auditory stimulation or receive instructions for functional visual inspection by sound; The return signal of the button is transmitted back to the control room through a dedicated multi-function optical transceiver to monitor the correct response rate and response time of the subject; both parties can easily realize flexible communication between the scanning room and the control room through the microphone speaker and headset
3). Room dedicated video monitoring system: In order to facilitate the observation of the state of the examinee in the nuclear magnetic room, the entire inspection process of the examinee is recorded and stored to ensure the safety of the examinee and facilitate the settlement of medical disputes. The video surveillance system of the nuclear magnetic room uses a special ultra-small optical transceiver, integrated in the camera, and uses optical signals to transmit to the control room for viewing and storage; the impact of completely high magnetic energy on video surveillance.
Well, the above is the relevant detailed explanation about the technical principles and application fields of VGA optical transceiver, I hope it can be helpful to you! Feichang Technology, a professional manufacturer of optical transceivers, optical fiber transceivers, industrial switches, and protocol converters, independently researches and develops brands, welcome to come to understand and communicate.